| Geyser | 1948-07-31 |
|---|---|
| Morning | 1015 |
| Values for Old Faithful Area | 1948-07-31 |
|---|---|
| Astronomical Twilight Begin | 03:05 |
| Nautical Twilight Begin | 03:53 |
| Civil Twilight Begin | 04:35 |
| Sunrise | 05:09 |
| Sunset | 19:49 |
| Civil Twilight End | 20:23 |
| Nautical Twilight End | 21:05 |
| Astronomical Twilight End | 21:53 |
| Moon Illumination | 29.47% |